Metal-drill.



No. 639,262. Patented Dec. l9, I899.

J. MILLS & A. s. SMITH.

METAL DRILL.

(Application filed Aug. 7, 1896.)

(No Model.) 2 SheotsSheet I.

I l 7. 5 l i 5 L l uil IM- WM Witnesses.

Q24 M Jun/M2214 a Attorney.

Inventors y 80 M5 W M% 2/ Patented Dec. 19, I899.

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J. MILLS &. A. 8. SMITH.

METAL DRILL.

(Application filed Aug. '7, 1896.)

(No Model.)

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JAMES MILLS AND ALBERT S. SMITH, OF CINCINNATI, OHIO.

M ETAL-DRILL.

SPECIFICATION forming part of Letters Patent No. 639,262, dated December 19, 1899.

Application filed August 7, 1896. Serial No. 601,945. (No modclf To all whom, it may concern.

Be it known that We, JAMES MILLS and AL- BERT S. SMITH, citizens of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and usefulImprovements in Metal-Drills, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

Ourinvention relates to that class of metaldrills known as radial drills; and it has for its object the improved construction of the movable drillcarrying parts whereby the greatest capacity of adjustment is provided and whereby the greatest strength and rigidity of the framework are obtained.

The novelty of our invention will be hereinafter set forth, and specifically pointed out in the claims.

In the accompanying drawings, Figure 1, Sheet 1, is a side elevation, partly broken away, of a drill embodying our invention. Fig. 2, Sheet 1, is a transverse section of the horizontal slide support on the dot-ted line w w of Fig. 1. Fig. 3, Sheet 1, is a corresponding View on the dotted line y "y of Fig. 1. Fig. 4, Sheet 2, is a sectional elevation on the dotted line a z of Fig. 1 looking toward the main column. Fig. 5, Sheet 2, is an enlarged sec tional plan view on the dotted line 00' 0c of Fig. 4. Fig. 6, Sheet 2, is a transverse section of the column on the dotted line y y of Fig. 4. Fig. 7, Sheet 2, is a corresponding View on the dotted line a z of Fig. 4:. Fig. 8, Sheet 2, is an enlarged sectional detail of part of the gearing and associated parts.

The same letters of reference are used to indicate identical parts in all the figures.

A is any suitable base on which is secured rigidly a short column or stump B, upon which is journal'ed in any suitable manner so as to turn axially thereon a two-part column C, the heavier member of which has a fiat flanged bearing-face in a plane substantially diametrical to the column B, and both parts are united at the top by a head-piece vertically adjustable upon the column by means to be presently explained, and horizontally adjustable in said saddle is a slide F, hollowed out on its side facing the column 0 and having secured to one end a head-stock G of the drill, the union between the two being preferably formed by circular plates at l) in such manner that the head-stock may be adjusted on the slide F and locked thereto to give the drill any degree of inclination desired. Secured to the column 0, preferably by arms 0 at its top and bottom, is a vertically-slotted foot piece or brace H, whose lower end or foot 6 rests upon an annular support 01 on the base A. This foot-piece is located at some little distance to one side of the column opposite to the drill, and the saddle is extended, as seen in Fig. l, and is provided with threaded bolts extending through the slot fof the brace and engaged by the clamping handle-nuts g to securely lock the saddle when adjusted up or down to the brace H.

It is obvious from the foregoing description that the column 0, with its saddle, slide, and head-stock, can be rotated on the column B, and when brought to the proper position the column 0 can be locked to the column B, a screw-handle it being shown for that purpose.

We will now proceed to describe the driving mechanism for the various parts, so that the operation of the drill may be fully understood.

Suitably journaled through the columns B and C is a vertical shaft 1, driven from beneath the base A by any suitable mechanism, such as a pinion fast on a power-shaft concentric with the columns B and C and meshing with a pinion fast on the shaft I, (not shown in the drawings, however, as this construction forms no part of our invention.) This shaft I extends through the head D and has fast upon it a pinion 2', engaging by means of intermediate shiftable gears j, controlled by a shifting lever 72-, suitably secured to the member 0 of the column O, a pinion 1 upon a vertical screw-shaft m, passing down through and engaging the saddle E in such manner that when the handle It is thrown to one extreme position the saddle will be lowered and when thrown to the opposite extreme position it will be raised and when placed in a position intermediate of the two extremes the gear 2 will be disengaged from the gearl and the saddle will be held at rest. A second screwshaft 07. is journaled in the slide F and engages a fixed threaded portion 0, Fig. 1, of the saddle. Upon this shaft is a beveled pinion p, engaged by a similar pinion q on a short crank-shaft r, journaled in the slide, so that by turning said shaft the shaft 02 is rotated and the slide F caused to travel in or out in its bearings in the saddle. If desired, the shaft it may be connected by gearing with the shaft I, so that power may be employed automatically in shifting the slide. 7

Referring now to Figs. 1, 4, 7, and 8, the means for operating the drill-stock will be readily understood. Feathered upon the shaft I is a pinion s, constantly meshing with a pinion t on a short stub-shaft u, carried by the slide F, and the means for holding the pinion s are an arm 12 beneath it carried by the slide F and an arm to above it having its inner end perforated and embracing a circumferential groove in the shaft u. Upon the upper end of the shaft u is a beveled pinion ct, engaging a beveled pinion Z) upon a shaft 0', journaled horizontally in the slide F and extending through the center of the plate a of the head-stock G, where it is provided with a beveled pinion d", meshing with a similar pinion e upon the lower end of a shaft f, suitably journaled in the head-stock and carrying a pinion g, Fig. 1, meshing with a pinion h, feathered upon the drill-stock or spindle t".

In addition to the shaft m for raising and lowering the saddle automatically by power we provide separate hand means for obtaining close and nice adjustments, which consist in a shaftj, suitably journaled upon the slide F and operated by a hand-wheel 7a. This shaft has a worm Z, Fig. 6, engaging a wormwheel on upon the shaft m, so that by turning the hand-wheel It the saddle may be raised or lowered, as desired.

While we have shown and described various driving mechanisms for the adjustments of the saddle and slide F, yet it is to be un: derstood that our invention in these particulars is not to be restricted to the means shown and described, as various other means might be employed, and while we prefer the use of the member 0 of the column C it might be dispensed with, for our chief purpose in the present application is to obtain such a construction of the column and such an arrange ment of the movable parts thereon as will give the greatest strength and rigidity, and this we accomplish by the broad flat bearing for the saddle and the location therein of the slide set on ends and the brace H turning with the column adjustably bolted to the saddle and resting upon the brace.

While we have shown the foot e as simply resting on the annularsupport cl, it is obvious that, if desired, in heayy work the foot 6 may be rigidly clamped to the annular support.

Having thus fully described ourinvention, we claim- 1. In a metal-drill, the combination of the base having an annular support, a column revoluble thereon and carrying a saddle and horizontal slide, a foot-brace carried by the columnand resting on said annular support, and means for lockin g said saddle to said foot= brace, substantially as described.

2. In a metal-drill, the combination of a vertical revoluble column, a main drivingshaft extending therethrough and driven from beneath the base, an annular support on the base, a foot-brace carried by the column and resting on said support, a saddle gibbed to the column and adjustably locked to said brace, a horizontal slide for the head-stock, of the drill sliding in said saddle, and means for driving the drill and adjusting the parts, operated by the main shaft, substantially as described.

JAMES MILLS. ALBERT S. SMITH.

Witnesses:

J. THOMSON CROSS, BERNARD J. HAUsFELn. 

